CAMRT Radiography Practice Exam

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What slice thickness is recommended for high-resolution CT studies of the chest?

2.5 mm

0.625 mm

1.25 mm

For high-resolution CT studies of the chest, a slice thickness of 1.25 mm is recommended because it strikes an optimal balance between providing sufficient detail and minimizing noise, thereby improving the clarity of the anatomical structures being examined. High-resolution CT is particularly useful for visualizing fine details in lung tissue, such as interstitial lung disease or pulmonary nodules. Thinner slices, such as 0.625 mm, while offering even greater detail, can result in increased radiation dose and potential artifacts, making 1.25 mm a practical choice that ensures high-quality imaging without unnecessary exposure.

Slice thicknesses greater than 1.25 mm might compromise the detection of small lesions or subtle changes in lung parenchyma. Therefore, 1.25 mm is the recommended thickness for achieving a high-resolution image in thoracic imaging.

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5 mm

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